Cleaning device for draft systems, especially for flyer draft systems



May 13, 1958 E. ENNIESSEN 2,334,062

CLEANING DEVICE DRAFT SYSTEMS, ESPECIALLY was 2 Sheets-Sheet 1 Filed Sept. 14. 1954 FOR FLYER DRAFT SYS INVENTOR my Maw/55m Arm's.

May 13, 1958 E. TOENNIESSEN 2,834,062

CLEANING DEVICE FOR DRAFT SYSTEMS, ESPECIALLY FOR FLYER DRAFT SYSTEMS Filed Sept. 14, 1954 2 Sheets-SheetZ /N MN 702 zmsr mew/55m CLEANING DEVICE FOR DRAFT SYSTEMS, ESPE- 5 CIALLY FOR FLYER DRAFT SYSTEMS The invention relates to a cleaning device for the rollers and cylinders of textile draft systems, more particularly for the draft mechanisms of fiyer spinning machines which work with high drafts.

The quantity of flying fibres and free fibres arising in a draft system during the drawing of fibre bands and which remain clinging to the rollers and cylinders of the draft system increases with the quantity of fibre to be drawn outiand the increase of the draft employed. For fiyer draft systems which are working with high draft, a good efficiency of the cleaning means for the rollers and cylinders is therefore especially important.

In the past the means mainly used for cleaning fiyer r draft systems has been cleaning boards or cleaning rollers with felt or the like stretched thereon, these lying against the upper rollers from above and against the lower rollers from below in the part where the fibres run through. With modern fiyer machines with high draft however the deposition of fibres on the cleaning rollers or boards is often so great that the continual cleaning of these means by removal of the fibres gathered thereon presents difficulties, and the result is that the fibres accumulated on the cleaning devices are carried away and cause irregularities in the yarn.

The invention is directed towards constructing the cleaning devices in draft systems, in particular in fiyer draft systems with high draft, in such a way that they act more effectively and can be cleaned easily and quickly. The cleaning boards or frames used for cleaning the lower cylinders, which extend from the delivery rollers to behind the intake rollers have in the past been arranged to swing in fixed bearings at the rear ends so that the front ends can be lifted away from the lower cylinders and swung down. These cleaning boards are usually pressed, in their working position, against the lower rollers by means of counter weights projecting to the rear. In distinction to this, the lower cleaning plates according to the present invention are suitably held in their position of application to the lower cylinders by a releasable locking device at their front ends. Preferably they are hung at their rear ends so that on swinging down and away they are also displaced forwards.

In order that the lower cleaning plates, on swinging down, shall at the same time also move forwards, they can have at their rear ends slidable means of suspension, which may be in the form of hooks, so that the lower cleaning plates can also be unhooked at their points of suspension and can be removed completely.

The locking device at the front ends of the lower cleaning plates consists conveniently of springs which are at-' tached at their upper ends to the holders for the upper or pressure rollers or to some other part of the draft system, their lower ends engaging the cleaning plates in the posi- Patent 9 6 2,834,062 Patented May 13, 1958 tion of application and having a hook-like head with an inclined running-on surface which gives way when the coordinated lower cleaning plate is swung up and automatically snaps into the position which locks the cleaning plate.

By the construction according to the invention there is ensured speedy and good accessibility of the lower cleaning plates, especially with fiyer draft systems in which as a rule only a low space is available between the cylinders and the cylinder bed for receiving the swung-down cleaning devices.

The cleaning devices for the upper rollers may be formed by reciprocating cleaning boards or plates which may extend over several neighbouring sliver passages in the direction parallel to the rollers. In the past such cleaning boards for the upper rollers were used only with drawing frames which take up several fibre bands at the same time on each run and, by doubling and again drawing out, give again a fibre band of same diameter. By the use of such cleaning boards on draft systems for fiyer spinning machines, which work with high draft, there is obtained a better cleaning of the tlyer draft system resulting in an improved uniformity of the spun yarn.

The drawings show examples for the construction of the cleaning device according to the invention with a fiyer draft system:

Figure l is a cross-section through a four-cylinder fiyer draft system for high draft with cleaning devices for the upper and lower cylinders in the working position;

Figure 2 is the same arrangement with the lower cleaning plate swung down;

Figures 3 and 4 show respective views of a different.

construction of upper and lower cleaning devices; and

Figure 5 is a detail.

The fiyer draft system has four pairs of rolls 1I, 2II, 3-III and 4-IV, the pressure rollers 1, 2, 3, 4 of which are cleaned by a cleaning board 5 which extends from the intake rolls 1-1 to the delivery rolls 4 IV. The cleaning board is driven by a push rod 6 or the like on the lever arm 7 of an oscillating shaft 8, which may extend over the whole length of the draft system and pushes the cleaning board 5 to and fro on the pressure rollers in the longitudinal direction of the band. The cleaning board 5 can extend over several neighbouring pressure rollers or sliver passages in the longitudinal direction of the cylinders.

The ribbed lower cylinders I, II, III, IV are cleaned by a cleaning plate which here is formed by an endless band 9 stretched over a frame it). Between the front frame bar 11 and the rear frame bar 12 there is a raised frame bar 13, so that the cleaning surface touches all the lower cylinders here from below. The frame 1b is provided at suitable points of its rear frame bar with wire hooks 14 by which it is hung on the oscillating shaft 8. The wire hooks 14 have longitudinal eyes 15 which project to the rear over the oscillating shaft 8 when the frame 19 forming the lower cleaning plateis inthe Working position shown in Figure l. in this position the frame is supported with the bent part 16 of its hanging eye on the oscillating shaft, while at the front end it is locked by its bar .11 at suitable points by springs 17. At their upper ends these springs are attached each by a screw 18 to a pressure roller holder, and at their lower ends they are provided with a hook-like head 25) below which there is a sloping surface 21. If the locking springs 17 are held at their lower ends and drawn outwards then the frame 10 is freed from the locking and its front end falls down;

t9 the Qy nder d 2 w i at he same time i s. eye portion 15 moves forward. Thus the lower cleaning surface becomes easily accessible in its swung-down position so that, in spite of the small space between the lower cylinders l-IV and the cylinder bed 208 the surface, covered with fibres, can easily be Cleaned with a brush or the like without it being necessary to remove completely the lower cleaning plate. To bring it back into the working position it is only necessary to swing the frame 10 up at the front end with a slight pressure. The front bar 11 then strikes against the sloping surface 21 the sprines 17, which bend outwards and then automatically snap under the front frame bar.

The cleaning boards for the upper rollers can, in spite of their drive, also be easily removed and cleaned since they are only mounted on the levers 7 of the oscillating shaft 8 by loops 22 of their push rods 6.

If the lower cleaning plate is required, in the released position, to lie flatter and further forward, as shown in Figures 2 and 4, then this is easily and simply attained by a corresponding formation of the rear hanging connection. For example, in the constructional form of Figure 1 the hanging eye can have the form shown by dotted lines at 24, so that the plate lies with the rear end lower when in the freed position.

. In the constructional form of the draft system of Figures 3 and 4 the drive of the cleaning board 5 which is on the pressure rollers 1, 2, 3, 4 comes from an oscillating shaft 25, which 'here is above the pressure rollers and is provided with an arm 26 fixed to it. The cleaning board 5 lies free on the arm 26, which here has merely the task of pushing the cleaning board forward in the direction from 1 to 4, while the return movement to the rear follows automatically under the action of the drive exerted on the cleaning board by friction with the pressure rollers running in the direction of the arrows. The cleaning board 5 thus has no attachment to the arm 26 and can be lifted away at any time, and can easily be cleaned on the lower surface which touches the pressure rollers.

The lower cleaning device for the cylinders I-IV also consists of a cleaning board 27 with a felt overlay 28, supported on a sponge rubber bed 29 for greater softness. The board has holders 30, of stamped sheet metal or the like, projecting to the rear and provided with hook-like bent-over ends 31. The cleaning boards 27 are supported by the holders 30, 31 with their rear ends on flat guiding pieces 32, which are provided with slots 33 through which pass the holders 30, and each being clamped by a screw on to the rear end of the stand 34. The slots33 are so dimensioned that the holders 30, 31 of the cleaning boards 27 can only be removed through the slots 33 in the horizontal position of the cleaning board. At the front ends, the cleaning boards 27, as also the frames 10, are secured by a flat spring 17, as in Figures 1 and 2, engaging under the cleaning boards in the position of application, and attached by a screw 18 to a pressure roller holder 19. To clean the lower cleaning boards the flat springs 17 are drawn so far forward that the front ends of the cleaning boards 27 are freed. The front end of the freed cleaning board then drops down on to the cylinder bed 200 and at the same time the holder 30'moves forward in the guiding piece 32 so that the ends 31 come against the guiding piece 32. In this manner the cleaning board with its felt overlay 28 becomes easily accessible below the cylinders Ie-IV, so that it can be cleaned quickly and easily. On swinging up the cleaning board 27, holders 30 return into the slots 33 until the turned-down angles 35 of the holder again strike against the guiding pieces 32 and the lower ends of the springs 17 again en gage under the cleaning board.

For inserting or removing the lower cleaning board it is necessary either to turn the flat springs 17 so far to one ls or draw them ba k; a th c a n oar be drawn out to the front in a horizontal position. The

cleaning boards are thus secured against unintentional loosening of the guiding pieces 32 by the action of the fiat springs 17.

What I claim is:

l. A roller cleaning device for draft systems, in particular flyer draft systems, comprising lower cleaning plates engaging the lower draft cylinders from below and extending from the delivery cylinders to behind the intake cylinders, said cleaning plates being tiltably mounted at their rear ends behind the intake cylinders for being swung down from the lower cylinders, and releasable fiat locking springs for securing their front ends in their operative position, said locking springs being fixed with their upper ends to an upper fixing point of the system and having a hook-like head with an inclined abutment surface at their lower ends engaging the front ends of the lower cleaning plates in their oper'ativeposition.

2. A roller cleaning device according to claim 1, wherein said lower cleaning plates are provided at their rear ends with rearwardly extending suspension hooks cooperating with a rear hook receiving element for tiltably supporting the lower cleaning plates, said suspension hooks extending in operative position of the cleaning plates behind their hook receiving elements for allowing a lengthwise forward displacement of the lower cleaning plates during their downward movement from operative into released inoperative position.

3. A roller cleaning device for draft systems, in particular flyer draft systems, comprising lower cleaning plates engaging the lower draft cylinders from below and upper cleaning plates engaging the upper rollers from above, said lower cleaning plates being tiltably mounted at their rear ends for being swung down from the lower cylinders into a released inoperative position and being secured at'their forward ends in their operative position by fiat locking springs, said springs being fixed with their upper ends to an upper fixing point of the system and having at their lower ends a hook-like head with an inclined abutment surface for engaging the front ends of the lower cleaning plates in their operative position, said upper cleaning plates resting loosely on the upper rollers of the system and cooperating by their rear ends with reciprocating drive means, said drive means being formed by radial arms of a horizontal driving shaft disposed behind the rollers and extending parallel thereto, said shaft receiving an oscillating rotational drive by which said radial arms are swung to and fro in vertical planes at right angles to the roller axes.

4. A roller cleaning device as claimed in claim 3, in

which said lower cleaning plates are provided at their rear ends with rearwardly extending suspension hooks cooperating with a rear hook receiving element for tiltably supporting the lower cleaning plates. said suspension hooks extending in operative position of the cleaning plates behind their hook receiving elements for allowing a lengthwise forward displacement of the lower cleaning plates during their downward movement from operative into released inoperative position.

5. A roller cleaning device for draft systems, in particular fiyer draft systems, comprising lower cleaning plates engaging the lower draft cylinders from below and upper cleaning plates engaging the upper rollers from above, said lower cleaning plates being provided at their rear'ends with rearwardly extending suspension hooks cooperating with a rear hook receiving element for tiltably supporting the lower cleaning plates which at their forward ends are secured in their operative position by locking means, said suspension hooks extending in operative position of the cleaning plates behind their hock receiving elements for allowing a lengthwise forward displacement of the-lower cleaning plates'during their downward movement from operative into released inoperative position, said upper cleaning plates resting loosely on the upper rollers of the system and perfecting a reciprocating movement driven by radial arms of a horizontal driving shaft extending parallel to the cylinders and rollers, said shaft receiving an oscillating rotational drive by which said radial arms are swung to and fro in vertical planes at right angles of the roller axes, said rear hook receiving element for the rearwardly suspension hooks of the lower cleaning plates being formed by said horizontal driving shaft effecting the drive of said reciprocating upper cleaning plates. 7

References Cited in the file of this patent UNITED STATES PATENTS FOREIGN PATENTS Great Britain Oct. 8, 1937 

